Method of removing scale from boilers.



G. JAYME.

METHOD OF REMOVING SCALE FROM BOILERS.

APPLICATION FILED JULY 21, 1914.

Patented May 18, 1915.

m a 1 J :r%//////// .1 W 1 \L Y m 5: l fifv m J 1 m 3 a "F" 7 a JH m a? m if W 5% 1m w M A 7/ /%//V////%/ fl// p INVENTOR WITNESSES GEORGE JAYME, OF PITTSBURGH, PENNSYLVANIA METHOD OF REMOVING SCALE FROM BOILERS.

Application filed. July 21, 1914. Serial No. 852,281.

To all whom it may concern:

Be it known that I, GEORGE JAYME, a

citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Methods of Removing Scale from Boilers; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to method of removing scale from boilers.

The object of my invention is to providewater rises the oil floats on the same, coats the tubes, and attacks the scale. Steam/is then introduced at the upper end of the boiler to agitate the fluid and cause a thorough mixture so that the scale at all points will be reached and acted on by the mixture. i

In the accompanying drawings, I have illustrated in Figure 1 a sectional view of a boiler of the Stirling type; and Fig. 2 is a longitudinal sectional view of-the upper end taken through the drums.

The numeral 2 designates the furnacewalls;. 3 the grate-bars of the fuel-chamber, 4 the lower-drum, 5 the bank of the tubes Y connecting the lower-drum with the upperdrum 6, 7 the bank of tubes connectingthe lower-drum with the middle drum 8, and 9 the bank of tubes connecting the lower-drum with the upper-drum 10.

Suitable baflles 11 and 12 are employed. The upper-drums are connected by the pipes 13 in the usual manner.

The water is admitted to the boiler by the pipe 14 and'steamis admitted by pipes 15. In the operation-of removing the scale, I first introduce into the boiler a composition composed of crude-oil and kerosene in proper proportions according to the ,character and condition of the scale to be removed, and prefer to add a portion of pulverized graphite For ordinary purposes, I

use lg gallons ofcrude oil,'11} gallons kerosene and} pound of pulverized graphite.

This. mixture is introduced in the lowerdrum 4: before the water is introduced. The water, heated preferably to about 190 is introduced, the oil being lighter than water will rise to the top of same, and as the water rises in the tubes, the mixture floating on top will coat the walls of the tubes and attack the scale. When the boiler is almost full of water, the mixture will be floating on the top of same, and in order to mix the mixture thoroughly with the water and so provide for reaching all parts of the boiler and the scale at all points, I provide for the agitation of the liquid, and this I accomplish by the introduction of steam atproper pressure through the pipes 15. Steam is introduced at from 100 to 135 pounds by the pipes 15, and this steam may be turned in from another boiler or from the main steamheader. This introduction of the steam will act to agitate the water and mix the oil thoroughly therewith, causing a circulation and thereby reaching all points in the boiler. This agitation may be kept up several hours, and after this agitating operation, the liquid is allowed to stand for about a period'of forty-six (46) hours to permit the mixture to soak in and attack and soften the scale. In many instances, after such a period, it will only be necessary to open the blowofi' valve and by the introduction of water at about 200 pounds pressure, the scale will be removed. If,'howo ver, the scale adheres, it

"end of the boiler a mixture of crude-oil and kerosene, introducing water, raising the oil I by the introduction of the water, and introducing steam at the upper end of the boiler to agitate the liquid.

In testimony whereof, I the said GEORGE J AYME have hereunto set my hand.

. GEORGE JAYME.

Witnesses:

RoBT. D. TOTTEN,

JOHN F. WILL.

Specification of Letters Patent. I PatentedMay18,1915. 

